TB coolant crossover,any disadvantages? - ZR-1 Net Registry Forums

Z51JEFF · 03-19-2010

How many have done this?

bobbyhi · 03-19-2010

I have the by-pass and no problems. I don't have to worry about any leaks at the TB.

Aurora40 · 03-19-2010

One disadvantage is if you don't flare the ends of the bypass pipe, and the rubber line slips off and streams coolant under your plenum killing your starter. Ask me how I know about that one?

GOLDCYLON · 03-19-2010

I have, no issues on my DD in AZ heat either

Locobob · 03-19-2010

I bypassed both the throttle body and the entire plenum, no regrets. I did a write up on it for HOTB - last year I think?

A26B · 03-19-2010

Quote:

Originally Posted by Aurora40

One disadvantage is if you don't flare the ends of the bypass pipe, and the rubber line slips off and streams coolant under your plenum killing your starter. Ask me how I know about that one?

Yep! I didn't have the bypass though. The stock hose ruptured, facing towards the plenum (of course) & flooded the valley. Stuck in a gas station, fixed it, starter toast but easily push started (small miracle).

Lesson: don't forget the "little" coolant hoses when you replace the "big" ones.

Z51JEFF · 03-19-2010

Thanks for the replies.The reason I want to do this is to save the paint on the TB.

PhillipsLT5 · 03-19-2010

got it

Z51JEFF · 03-27-2010

Anybody got some pictures of this mod?I broke out the tube cutter,bender,flaring tool and then ran into a wall.The plan was to make a hard line and run it under the front of the plenum keeping the coolant line intact,no room wont work.Next plan was to plug the line on both sides of the TB with the lines intact keeping the look stock.My question is the small line coming off the TB going back into the plenum,is this for a return back into the system only?Ive even thought about removing the TB plate and filling the cavity with epoxy to seal out the coolant,thats a bit drastic.

scholtmj · 03-27-2010

Quote:

Originally Posted by Z51JEFF

Anybody got some pictures of this mod?I broke out the tube cutter,bender,flaring tool and then ran into a wall.The plan was to make a hard line and run it under the front of the plenum keeping the coolant line intact,no room wont work.Next plan was to plug the line on both sides of the TB with the lines intact keeping the look stock.My question is the small line coming off the TB going back into the plenum,is this for a return back into the system only?Ive even thought about removing the TB plate and filling the cavity with epoxy to seal out the coolant,thats a bit drastic.

http://zr1specialist.com/HAT%20Web/p...t%20bypass.htm

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03-19-2010	#1
Z51JEFF Join Date: Dec 2007 Location: Fremont,Ca Posts: 3,049	TB coolant crossover,any disadvantages? How many have done this?

03-19-2010	#2
bobbyhi Join Date: Jul 2005 Location: Mendota Heights, MN. 55120 Posts: 984	Re: TB coolant crossover,any disadvantages? I have the by-pass and no problems. I don't have to worry about any leaks at the TB. __________________ Bob Anderson 1990 #2405 White/Gray Haibeck chip,4:09 gears,Power Effects Exhaust,5 spoke chrome,C5 brakes,49th Street rockers,K&N,Hurst,Headers,Upper & lower ported Minnesota State Director Founding Member #19

03-19-2010	#3
Aurora40 Join Date: May 2005 Location: Leesburg, VA Posts: 2,713	Re: TB coolant crossover,any disadvantages? One disadvantage is if you don't flare the ends of the bypass pipe, and the rubber line slips off and streams coolant under your plenum killing your starter. Ask me how I know about that one? __________________ Bob Saveland Former owner of #2517 [IMG]http://a.random-image.net/aurora40/vette.jpg[/img]

03-19-2010	#4
GOLDCYLON Join Date: May 2007 Location: Peoria, AZ Posts: 9,153	Re: TB coolant crossover,any disadvantages? I have, no issues on my DD in AZ heat either __________________ GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director 91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V

03-19-2010	#5
Locobob Join Date: Jan 2004 Location: Portland, OR Posts: 1,057	Re: TB coolant crossover,any disadvantages? I bypassed both the throttle body and the entire plenum, no regrets. I did a write up on it for HOTB - last year I think? __________________ Robert ZR-1 Net Registry Oregon State Director 91 ZR-1 #431 Black/Black LPE 368

03-19-2010	#8
PhillipsLT5 Join Date: Aug 2005 Location: Scottsdale, AZ Posts: 2,450	Re: TB coolant crossover,any disadvantages? got it

03-27-2010	#9
Z51JEFF Join Date: Dec 2007 Location: Fremont,Ca Posts: 3,049	Re: TB coolant crossover,any disadvantages? Anybody got some pictures of this mod?I broke out the tube cutter,bender,flaring tool and then ran into a wall.The plan was to make a hard line and run it under the front of the plenum keeping the coolant line intact,no room wont work.Next plan was to plug the line on both sides of the TB with the lines intact keeping the look stock.My question is the small line coming off the TB going back into the plenum,is this for a return back into the system only?Ive even thought about removing the TB plate and filling the cavity with epoxy to seal out the coolant,thats a bit drastic.